mapResponseEntity
Description
The mapResponseEntity
directive is used as a building block for Custom Directives to transform a response entity that was generated by the inner route.
See Response Transforming Directives for similar directives.
Example
- Scala
-
source
def prefixEntity(entity: ResponseEntity): ResponseEntity = entity match { case HttpEntity.Strict(contentType, data) => HttpEntity.Strict(contentType, ByteString("test") ++ data) case _ => throw new IllegalStateException("Unexpected entity type") } val prefixWithTest: Directive0 = mapResponseEntity(prefixEntity) val route = prefixWithTest(complete("abc")) // tests: Get("/") ~> route ~> check { responseAs[String] shouldEqual "testabc" }
- Java
-
source
import static org.apache.pekko.http.javadsl.server.Directives.mapResponseEntity; final Function<ResponseEntity, ResponseEntity> prefixEntity = entity -> { if (entity instanceof HttpEntity.Strict) { final HttpEntity.Strict strict = (HttpEntity.Strict) entity; return HttpEntities.create( strict.getContentType(), ByteString.fromString("test").concat(strict.getData())); } else { throw new IllegalStateException("Unexpected entity type"); } }; final Route route = mapResponseEntity(prefixEntity, () -> complete("abc")); testRoute(route).run(HttpRequest.GET("/")).assertEntity("testabc");
1.1.0